div.dropdown {
  position: absolute;
  width:4em; /* needed for IE */
  overflow: auto;
  background: #fff;
  border: 1px solid #aaa;
  z-index: 99;
  margin: 0;
}

div.dropdown ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
}
div.dropdown li {
  cursor: pointer;
  height: 10px;
  font: 12px/1 Helvetica, Arial, sans-serif;
  padding: 4px 3px;  
}
div.dropdown li.selected {
  background: #0063CE;
  color: #fff;
}